If you would like some guidance on how to pose people, try the app "Posing App" for your smart device. It has an amazing number of poses done as line drawings and organized by: Men, Women, Groups, Weddings, etc.
Get you color right regardless of the environment. Shoot a picture of the Colorchecker Passport, and use it to create a profile for the entire shoot. Apply the profile in Lightroom or Photoshop, and your colors POP.
There are some great webinars offered at www.XRitePhoto.com Just go to "Webinars" and lookup the archived webinars for topics of interest. They are free.